Electric-lamp bracket.



No. 810,244. PATENTED JAN. 16, 1906. G. 0. WRIGHT. ELECTRIC LAMP BRACKET.

APPLIOATION FILED MAR.30,1904.

Wfineaue. vlaw/Wagon.

UNITED sTA'r S;

PATENT oEEro GEORGE o. WRIGHT, or CLEVELAND, omo.

ELECTRIC-LAMP BRACKET.

Specification of Letters Patent.

Patented Jan. 16, 1906-.

Application filed Karol! 80, 1904. 'Sorlal No. 200,686.

. To all whom, it may concern:

struct a swinging electric-lamp bracket that asafe, eflicient, and durable electrical connec- *'on will be maintained between the feedwires and the lamp, irrespective of the posi tion occupied by the swinging member of said bracket or the frequency with which it is moved. I

The invention may be here summarized as L the construction and combination of parts shown in the drawings and hereinafter described in the claims.

In the drawings, Figure l is aside elevation, part1 "in central vertical section,'ot' a lamp-brac et embodying the invention. 'Fig. 2 is aplan View looking into the open upper end 0 the bracket member B. Fig. 3 is a bottom plan" view looking into the 0 on lower end of the bracket member A, and ig. 4 is a sectional view in the plane indicated by the line 4 4 of Fig. 2.

The embodiment of the invention which the drawings show includes two cylindrical hollow cup-shaped members 'A and B, whose open ends are respectively telescoped a short distance the one into the other, in which position the are held by the axially-disposed bolt C, w 'ch obviousl permits said-members to rotate relative y about the axis of said bolt. The member A has a tubular projection a, which is preferably externally threaded, by means of which the bracket maybe attached to a suitable support. The

tubular lamp-supporting arm D is screwed into a tubular promotion 1) on the member B, the lamp-socket F being suitably secured to the outer end of this arm.

The insulating blocks E and G are fitted into the two members A and B, respectively, Two metal pieces H H are secured tothe block G. "Preferably the central part of each metal piece lies in a vertical notch in the edge of said block, while the two ends it h of the metal the upper and ower sidesof said bloc respectively. The lamp-wires K K'i. e. the conductor-wires, which go to the lampplate are turned over a ainsts0cketare in the tubular arm' D and enter the member B beneath the block G. They extend upward in. notches g in the ed es of said block G and are connected wit the metal binding-screw which passes through the block G and screws down into the lower members 72, of the metal piece H.

Two concentric-segmental plates M M of different diameters are let into the lower face of the block E. Each of these metal lateshas an upwardly-turned arm m, which ice in a slot in the edge of said block, and the feed-wires N N, which enter the member A. through the tubular projection a, are fastened to these arms by binding-screws m m. Spring actuated contact pins J, which serve as electrical brushes,-are movable in vertical holes in the block G. They project up through holes in the upper arms h of the metal plates H and. their ends respectively contact with the two metal plates M M. The

metal springs lie between the heads 7' of these, pins and the lower arms h of said metal plates and act to force said pins upward, and thereby to hold them in contact with the segments M. p I

Obviously, this bracket maybe turned into any position and may be turned as often as desired without imposing any strain upon the wires and without in any wise afl'ectingthe electrical connection. Fiber rings P may surround the two blocks E and G, lying betweenthem and the outer walls of the members A'and B, and a fiber disk 0 may lie below the block G and below the metal pieces H, carried thereby. These are precautionary nation of two hollow members each comprising a cup-like body with a tubular extension, such cups bein adapted to fit together, a

pivot-bolt by w ich said members are pivotally connected, solid insulating-blocks secured in said members and having faces close to each'other, a air of arcual contact-plates carried by such ace of one of the members, a pair of metal strips set'into slots in the other member and extending over onto the face of that member and adapted'to be electrically connected with said arcual plates.

2. In an electric-lamp bracket, the combination of a hollow member having a tubular projection by which it may be fixed to a suitable support, a second hollow member which is pivotally connected to such fixed member and has a tubular projection, an insulatingblock intone of said members, metallic contact-platescarried thereby,-'contact-wires entering the hollow member through said tubular projection and fastened to said contactlates, an insulating-block in the other holow member having slots in its sides, two metallic pieces which-enter said slots and have their ends turnedover onto the distant face of said block and are connected with two wires leading in from the corresponding tubular projection, said metallic pieces bein electrically connected with members whic contact with the metallic contact-plates first mentioned. 3. In an electric-lampbracket, the combination of a hollow member, an insulatingblock therein, metallic oontactpiates carried thereby, contact-wires entering the hollow member and fastened to said contachplates, a second hollow member which is pivotally connected to the member first mentioned, an insulating-block in said second hollow member having openings through it, two metallic pieces which occupy such openings and have their ends turned over uponthe two faces of said last-mentioned block, the ends on the {ace nearest the other block bein at diiierent distance from the axis to enab e individual connection between each of said metallic pieces and the corresponding contact-plate, and two wires whose ends occupy recesses in the block in said second hollow member and aroma are connected with said metallic pieces by screws passing through said last-mentioned block. a v

4. In an electric-lamp bracket, the combination of a hollow member having a tubular projection by which it may be connected to a suitable support, a hollow member which is pivotally connected to said fixed member, an insulating contact-block in the fixed member, metallic contact-plates secured thereto, 'con ductor-wires entering the hollow member through said tubular projection, and screws for fastening said wires to said contactplates, an insulating-block in the other holow bracket member having vertical slots in its sides, tw o metallic pieces having vertical members which enter said slots and. have their ends turned over against the upper and lower faces of said contact-block, there being holes passing down through those metallic plates which lie against the upper surface of said insulating-block and down into said block, ins movable in said holes, springseated in said holes 'and.-forcing said springs outward, and lamp-wires, and screws for electrically connecting them to said metallic pieces, a hollow lamp-supporting arm secured to the movable bracket member, and lampsocket secured to said arm.

In testimony whereof I hereuntd allix my signature in the presence of two witnesses. GEORGE C. WRIGHT.

Witnesses:

E. B. GILcHRIsT, E. L. THURSTON. 

